NMR Instruments

Ascend NMR Magnets

Bruker has specialized in the design and production of magnets and cryogenic systems for several decades, becoming the world's largest manufacturer of superconducting magnets for NMR. Our Ascend and Ascend Evo NMR magnets feature exceptional magnetic field quality, cryogenic efficiency, and easy siting.

Advanced Technology

Innovative Design

Highlights

Field Quality
Unique jointing, shimming and winding technologies lead to outstanding field stability and homogeneity. Bruker's External Disturbance Suppression (EDS) minimizes field perturbations from outside sources.
Easy Siting
Ascend and Ascend Evo magnets are built from the most advanced superconductors, making these magnets exceptionally compact. Active shielding minizes the stray field and makes siting particularly easy.
Cryogenic Efficiency
Advanced cryostat designs are used to minimize the consumption of liquid helium and nitrogen. Solutions are available for the reliquefaction of cryogens and the capture of boil-off gas.

Features

Incorporating Key Technologies for Best Performance and Cost Efficiency

The Ascend™ series of compact NMR magnets makes medium and high-field NMR spectroscopy extremely powerful, and at the same time reliable and convenient. Ascend magnets combine several of Bruker’s proprietary, innovative magnet technologies for superior performance and operational cost savings. The Ascend magnet design features advanced superconductor technology, enabling the design of smaller magnet coils, thus resulting in a significant reduction in physical size and magnetic stray fields. The Ascend magnets are therefore easy to site, as well as convenient and economical to operate.
 
Maximum Performance

  • Unique jointing technology leading to the lowest drift rates for outstanding field stability
  • Advanced shimming technology for highest field homogeneity
  • External Disturbance Suppression (EDS) with up to 99% screening efficiency against external magnetic field disturbances
  • Cryostats with excellent thermal efficiency for low cryogen consumption
  • Available with high-performance vibration isolators

Minimum Stray Fields

  • Easy siting with less preparation costs
  • Easy magnet access and rigging due to smaller size and weight
  • Reduced physical and magnetic footprint in the lab
  • Reduced ceiling height requirements

Ascend magnets are optimized for operation with Bruker’s room temperature shim systems, Bruker NMR probes, automation technology and refrigeration equipment, e.g. for integrated high-performance NMR systems used in structural biology, small molecule and/or materials research applications.

Bruker’s Ascend magnets also come in two sizes of standard-bore equaling 54 mm in diameter, and wide-bore which is 89 mm in diameter.

Ascend Evo 1.0 GHz NMR Magnet

Ascend Evo 1.0 GHz: Single-Story Compact 1.0 GHz NMR with Minimal Helium Consumption

The Ascend Evo 1.0 GHz is an ideal example to showcase the benefits of Bruker’s Ascend Evo technology: The Ascend Evo 1.0 GHz system offers a unique compact magnet with exceptionally small footprint, weight, and ceiling height requirements, as well as an impressively low liquid helium consumption of less than 80 ml/h. This novel and unique design minimizes siting, installation, and operational costs, and makes 1.0 GHz NMR accessible to a large number of labs.

Benefits

The availability of cutting-edge superconducting wire technology makes it possible to achieve magnetic fields of up to 1.2 GHz. Advanced superconductors also make it possible to design NMR magnets that are extremely compact, which, in combination with the minimization of the stray field by active shielding, is a key benefit when NMR systems need to be placed in space-restricted laboratories.

Bruker’s Electromagnetic Disturbance Suppression (EDS) provides excellent screening efficiency against external magnetic field disturbances, which is ideal when an NMR spectrometer needs to be sited in a challenging environment. Bruker’s proprietary jointing technology for high-current and high-field joints guarantee the lowest drift rates.



 

Accessories

Bruker offers an extensive range of accessories for the convenient, safe and efficient operation of superconducting NMR magnets. Please contact your Bruker representative for detailed information on NMR magnet accessories for achieving best performance and stability, ensuring operational safety or facilitating cryogen handling.

Electronic Atmospheric Pressure Device (EAPD)

Changes in the atmospheric pressure can lead to minute changes of the temperature of the helium inside an NMR magnet, as well as to temporary changes in the boil-off rate. Due to the excellent sensitivity of NMR systems, these effects can influence NMR experiments. For NMR systems ≥ 600 MHz, Bruker thus recommends the use of the Electronic Atmospheric Pressure Device (EAPD) which actively controls the helium pressure in the magnet system to a constant value, leading to improved stability for particularly sensitive NMR applications.

Bruker Nitrogen Liquefier (BNL)

Bruker’s Ascend and Ascend Evo magnets are equipped with a liquid nitrogen stage to reduce the heat load on the helium tank. The Bruker Nitrogen Liquefier (BNL) is a retrofittable component which makes use of a cryocooler to reliquefy the nitrogen which evaporates from the NMR magnet. Typically, the BNL makes it possible to operate an NMR magnet with zero nitrogen boil-off, completely eliminating the need for nitrogen refills. The BNL has been carefully engineered with respect to vibration isolation to ensure that the NMR performance in uncompromised.

Bruker Smart Nitrogen Liquefier (BSNL )

Just like the BNL, the Bruker Smart Nitrogen Liquefier (BSNL) reliquefies nitrogen from the NMR magnet. Instead of a dedicated cryocooler, the BSNL makes use of excess cooling power from the CryoPlatform, which is used to cool Bruker’s CryoProbes. The consumption of liquid nitrogen can thus be reduced significantly – and often even completely eliminated – without additional power consumption. The BSNL can be ordered as an option with a new CryoPlatform and can be retrofitted to existing NMR magnets.

Vibration-Isolation Solutions

Floor vibrations can lead to unwanted artefacts in NMR spectra depending on their actual frequencies and amplitudes. Bruker’s Ascend and Ascend Evo magnet stands are available with integrated high-performance passive vibration isolators that are generally very effective at most sites, even on upper floors of buildings. For particular challenging vibrational environments that experience intense floor vibrations at low frequencies, Bruker offers supplemental active vibration isolation solutions employing piezoelectric technology and a “quiet platform” the magnet system is placed on.

Bruker Magnet Pump Control (BMPC/2)

Many of Bruker’s highest field magnet coils are operated at a temperature of 2 K to increase the critical current of the superconducting wires. In these magnets, the operating temperature is achieved and maintained by evaporating helium at significantly reduced pressure in a special refrigeration unit inside the cryostat. The Bruker Magnet Pump Control, now in its second generation (BMPC/2), houses the pumps and the control system which are required for the safe and reliable operation of these magnets.
 

HelioSmart Recovery Solution

The Bruker HelioSmart Recovery system is a very compact, easy-to-site helium collection unit that has been carefully optimized for the use with NMR spectrometers.

Helium is a scarce non-renewable resource. To protect this resource in a socially responsible way and to make lab operations more sustainable, the Bruker HelioSmart Recovery system collects helium boil-off from NMR magnets and stores the gas in high-pressure cylinders. From there, the gaseous helium can be re-used for other purposes or returned to a gas supplier. NMR users who have access to a helium liquefaction facility can purify and reliquefy the helium and re-use it in an NMR magnet to become more independent, especially during periods of global helium shortage. To keep costs low and to make siting as easy as possible, the Bruker HelioSmart has been dimensioned to collect the steady-state boil-off of several NMR magnets in parallel, excluding helium transfers, resulting in a typical recovery rate of 80 - 85 percent. The Bruker HelioSmart Recovery system has been carefully engineered to ensure safe operation with NMR magnets and has been optimized to eliminate spectral artifacts.

The HelioSmart Recovery is currently only available in selected countries.

The Bruker HelioSmart Recovery is a fully integrated helium recovery system with an internal gas bag and a high-pressure compressor. The compressor starts and stops automatically as a function of the fill level of the gas bag. The recovery system is equipped with an electronic control unit with an intuitive user interface.

Support

Labscape

Service & Life Cycle Support for Magnetic Resonance and Preclinical Imaging

Bruker’s commitment to provide customers with unparalleled help throughout the buying cycle, from initial inquiry to evaluation, installation, and the lifetime of the instrument is now characterized by the LabScape service concept.

LabScape Maintenance Agreements, On-Site On-Demand and Enhance Your Lab are designed to offer a new approach to maintenance and service for the modern laboratory